实现了比较两图像的相似度，先转化为相同大小，然后生成图像的颜色直方图，最后比较两直方图的相似度-To realize the similarity of two images, first into the same size, and then generate the image color histogram, and finally compare the similarity of two histograms

计算图像的直方图，通过查找表修改图像外观，直方图均衡化，反投影直方图以检测特定的图像内容，实用均值漂移算法查找物体，实用比较直方图检索相似图片-Files: histogram.h histograms.cpp correspond to Recipes: Computing the Image Histogram Applying Look-up Tables to Modify Image Appearanc

通过比较两幅图像直接的直方图来测量两幅图像之间的相似性。因为直方图比较是基于逐个容器进行的比较，不考虑相邻容器的影像，顾比较之前对查询图像和输入图像减少颜色空间。-Direct histogram similarity measure between two images by comparing the two images. Because histograms are more individually based on cont

android平台上利用OpenCV的不同算法进行图像的比较，包括ORB, BRIEF, BRISK和FREAK算法-use the android platform to compare different algorithms OpenCV image, comprising ORB, BRIEF, BRISK and FREAK algorithm